Amiga Hardware Database Expansion cards



A2620 Manual Photo
AIBB
Company
Commodore, USA
 Date
1988
 Amiga
A2000
 Interface
CPU slot
 Autoconfig ID
514 / 80
    processor
  • 68020 @ 14 MHz, synchronous with the motherboard
  • 68851 memory management unit
  • factory installed 68881 @ 14 MHz, supports FPUs up to 68882 @ 25 MHz
  • can be upgraded to 68030 with the Harms Professinal-Pack 030 board
    memory
  • 2 or 4 MB 32 bit RAM
  • 16 or 32 256k×4 page mode ZIPs 80-100 ns
  • not expandable
  • RAM can be disabled or autoconfigured by setting a jumper
    notes
  • the first accelerator board for the A2000
  • boot ROMs below rev 6 are incompatible with Kickstart 2.0 and above
    • the ROM address space overlaps the upper 256 kB of the 512 kB Kickstart ROMs (Kickstart 1.3 is 256 kB only)
    • by the time AmigaOS loads, the boot ROMs are supposed to be off but due to a bug in the A26x0 ROM code they remain active, causing an address space collision
    • fitting a rev 6 or 7 ROM pair solves the problem
    • some boards are reported being incompatible with the newer ROMs either
  • in 68000 fallback mode the RAM is still available

    Photo
    Commodore A2620 -  front side
    front side

    Commodore A2620 -  back side
    back side




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